As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO FIELD DUE TO A LOST NR 1 ENGINE GENERATOR. FOUND THE CSD OVERSERVICED, AND THE DELTA P INDICATOR POPPED. METAL SHAVINGS WERE FOUND IN THE FILTER BOWL, SO CSD OIL SYSTEM WAS FLUSHED AND SERVICED. BOTH THE CSD AND GENERATOR WERE REPLACED.